| (19) |
 |
|
(11) |
EP 0 265 252 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
25.01.1989 Bulletin 1989/04 |
| (43) |
Date of publication A2: |
|
27.04.1988 Bulletin 1988/17 |
| (22) |
Date of filing: 21.10.1987 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
22.10.1986 US 922003
|
| (71) |
Applicant: THE BOARD OF REGENTS OF THE UNIVERSITY OF MICHIGAN |
|
Ann Arbor,
Michigan 48109-1092 (US) |
|
| (72) |
Inventors: |
|
- Filisko, Frank E.
Ann Arbor
Michigan 48105 (US)
- Armstrong, William F.
Ann Arbor
Michigan (US)
|
| (74) |
Representative: Thomson, Paul Anthony et al |
|
Potts, Kerr & Co.
15, Hamilton Square
Birkenhead
Merseyside L41 6BR
Birkenhead
Merseyside L41 6BR (GB) |
|
| |
|
| (54) |
Electric field dependent fluids |
(57) An improved electric field dependent fluid and method of preparing the same for use
at temperatures in excess of 100°C (typically 120°C) without releasing water comprising:
a nonconductive liquid phase; and a dispersed particulate crystalline zeolite phase
(e.g., M
(x/n)[(AlO₂)
x(SiO₂)
y]·wH₂O where M is a metal cation or mixture of metal cations of average valence charge
n, x and y are integers and the ratio of y to x is from about 1 to about 5, and w
is a variable). Such field dependent fluids are particularly useful in automotive
and/or other high temperature applications.